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| Understanding the concept of a buffer space | ||
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| Prev | Tuning the Volume Replicator memory parameters | Next |
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| Understanding the concept of a buffer space | ||
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| Prev | Tuning the Volume Replicator memory parameters | Next |
When a write is replicated, Volume Replicator allocates data buffers for it. These data buffers are allocated some memory. The amount of memory (buffer space) available to Volume Replicator affects its performance, which can affect the write performance to the underlying volumes.
To manage buffer space on the Primary and Secondary according to your requirements, use the following tunables:
MAX_MEMORY - Use the vxtune vol_rvio_maxpool_sz command to set a value for the MAX_MEMORY tunable or to view the value that is currently assigned to it.
BASE_MEMORY - Use the vxtune vol_min_lowmem_sz command to set a value for the BASE_MEMORY tunable or to view the value that is currently assigned to it.
NMCOM_POOL_SIZE - Use the vxtune vol_max_nmpool_sz command to set a value for the NMCOM_POOL_SIZE tunable or to view the value that is currently assigned to it.
READBACK_POOL_SIZE - Use the vxtune vol_max_rdback_sz command to set a value for the READBACK_POOL_SIZE tunable or to view the value that is currently assigned to it.
FORCE_MAX_CONNECTION - Use the force_max_conn command to set a value for the FORCE_MAX_CONN tunable or to view the value that is currently assigned to it.
MAX_TCP_COUNT - Use the max_tcp_conn_count command to set a value for the MAX_TCP_COUNT tunable or to view the value that is currently assigned to it.
NMCOM_MAX_MESSAGES - Use the nmcom_max_msgs command to set a value for the NMCOM_MAX_MESSAGES or to view the value that is currently assigned to it.
MAX_RECEIVE_GAP - Use the max_rcvgap command to set a value for the MAX_RECEIVE_GAP tunable or to view the value that is currently assigned to it.
RLINK_READBACK_LIMIT - Use the rlink_rdbklimit command to set a value for the RLINK_READBACK_LIMIT tunable or to view the value that is currently assigned to it.
NETWORK_PACKET_LOSS_TOLERANCE - Use the rp_incr_decr command to set a value for the NETWORK_PACKET_LOSS_TOLERANCE tunable or to view the value that is currently assigned to it.
TCP_SOURCE_RESTRICT - Use the tcp_src_port_restrict command to set a value for the TCP_SOURCE_RESTRICT tunable or to view the value that is currently assigned to it.
IOPATH_LOGGING - Use the iopath_logging command to set a value for the IOPATH_LOGGING tunable or to view the value that is currently assigned to it.
NAT_SUPPORT - Use the nat_support command to set a value for the NAT_SUPPORT tunable or to view the value that is currently assigned to it.